Question

Are Newton's laws of motion and Galileo's applicable only when there is no friction present? For example, galileo stated that an object requires an unbalanced force to change motion/direction, but only a balanced force is required to sustain it.

So if we want to move a bicycle from rest, we will need to apply an unbalanced force. Then when we need to sustain motion, will we need to keep applying that unbalanced force, or can we just apply a balanced force, keeping in mind the presence of friction.

Answer 1

Explanation:

well there is friction on Earth so we require to add countunous unbalanced force so that the cycle keeps on moving. if there would be no friction on Earth like in space the cycle would move forever.

Answer 2

well there is friction on Earth so we require to add countunous unbalanced force so that the cycle keeps on moving. if there would be no friction on Earth like in space the cycle would move forever